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Finding the Fourth Proportional to 638,125.42, 880,618.90 and 351,655.78

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Solution

The fourth proportional to 638,125.42, 880,618.90 and 351,655.78 is: 485,288.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,125.42 : 880,618.90 = 351,655.78 : x
  2. Step 2: Convert to fraction form
    638,125.42/880,618.90 = 351,655.78/x
  3. Step 3: Cross multiply
    638,125.42x = 880,618.90 × 351,655.78
  4. Step 4: Simplify right side
    638,125.42x = 309,674,723,081.56
  5. Step 5: Solve for x
    x = 309,674,723,081.56/638,125.42
  6. Step 6: Final answer
    x = 485,288.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.